Cyclops lesion

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[edit] Discussion of Cyclops lesion

Cyclops Charlie Brown
  • The cyclops lesion occurs with an estimated frequency of 1%–9.8% of patients following anterior cruciate ligament reconstruction.
  • Although the precise cause is unknown, it is believed that uplifting of fibrocartilaginous tissue during drilling of the tibia for anterior cruciate ligament reconstruction serves as a nidus for fibrous tissue deposition.
  • Pathologically, the lesion consists of central granulation tissue surrounded by dense fibrous tissue.


  • The lesion was so named because of its bulbous appearance and characteristic focal areas of reddish-blue discoloration (from venous channels) that resemble an eye at arthroscopy.
  • The lesion may result in loss of full extension and surgical débridement of the lesion results in restoration of full knee extension/

[edit] Imaging Findings for Cyclops lesion

  • At MR imaging, a soft-tissue mass is seen anteriorly or anterolaterally in the intercondylar notch near the tibial insertion of the reconstructed anterior cruciate ligament.
  • Because of its fibrous content, a cyclops lesion typically has intermediate to low signal intensity with all pulse sequences.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

Goldminer: Cyclops Lesion

[edit] References for Cyclops lesion